pearce



(No Model.) 2 SheetsSheet 1.

P. PEARCE.

DISTRICT, PULIUE, OR FIRE TELEGRAPH. No. 288,107. Patented Nov. 6, 1883.

(No Model.) v 2 Sheets-Sheet 2.

F. PEARCE.

DI STRIGT, POEIGE, QR FIRE TELEGRAPH. No. 288,107. Patented Nov. 6, 1883.

' UNITED STAT S" rnnnnnion runner,

PATENT FFICE.

on NEW YORK, n. Y.

pis rmor, POLlCE OR FIRE TELEGRAPH.

SPECIFICATIN formingpart of Letters Patent No. 288,107, dated November 6, 1883, p

I Application filed July 5, 1883. (No model.)

To aZZ whom, it may concerns Be it knownthat I, FREDERICK Pniinon, of

the city and State'of New York, have invent ed an Improvement in District-Police or Fire Telegraphs, of which the following is a speci-' fication. I

My invention relates to a callbox, in which the particular box is indicated by pulsations sent overthe line by an automatic circuitbreaker, and denoting the number or letter of the box, in combination with circuit-connections anda finger-key and sounder, by which a message can be sent and an answer received at the call-box while the automatic circuit- .breaker is held in a fixed position, and when the same is relieved it indicates at the central station the letter or number of the call-box. At the central station I employ a strip of paper and ink-markers or embossers, and magnets brought into action by the incoming current, and I combine with the recording instrument a second marker and a connection to a clock, by means of which the time is marked upon the paper automatically and periodically in one or more lines, thereby indicating unerringly the time when the call comes in from the distant caliber. This is of great importance; as it defines the time when an alarm of fire may be turned in, or when an ambulance or a police-call may reach the central station.

In the drawings, Figure 1 is a generaldiagram indicating the circuit-connections. Fig.

' 2 is a section of the call-box, with the automatic circuit devices uncovered. Fig, 3 is the circuit-breaker detached. Fig. 4 represents the contact-maker in the clock. shows the registering device, and Fig. 6 is a planof the paper with the inkniarking disks.

In Fig. 1, G B represents the callbox; B, the battery; 0, the clock at the central station. E is the callbell'at the central station; K,

the key; R, the relay; L, the line, and G the I R is the ink-register The ink or embossing return-wire or ground. at the central station. register I R is of ordinary construction. contains a reel for paper, a, and the paper passes beneath the roller 1), and it is drawn .along by the rollers c.

There are two inkmarking disks, d and e running in contact with elastic inking-rollers fg, and there are two magnets, kl, in the base of the instrument, The lever-armature k presses the paper up against the disk e when the magnet is is ener- Fig. 5

gized, and the armature-lever Z of the magnet Z presses the paper up against the ink-disk d when the magnet Z is energized. The magnet Z is for printing the messages coming in from the distant call-boxes by the disk (1, and the magnet k is for printing the time, both being printed on the strip of paper a. It is to be understood that when a signal is turned in from any distant station or call-box the pulsations from the main battery pass over the line L, through the key'K and relay R, and return by line G or ground The relay R closes the circuit through the local circuit by wires 1 3, through magnet Z, and by wires 4, 5, 6,. and 7, through local battery L B, and by wires 8 and 9 back to the relay R. \Vithin the clock there is a circuit-closer, hereinafter described, which periodically closes a circuit between the wire 8 and the wire 10, in which case the current. of the local battery either passes by the wire 10 through the magnet is, and by wires 6 and 7 to local battery, or else it divides, part passing by the wire 10, as last named, and another part going through the front stop of the relay when that is energized,

and by wires 1 3 let 5 6 7 to local battery, and

the current will also divide at the bell, a portion going from pne through the helix 2, and by wire 1 2 to 4, 5, 6, and 7 Thus there are three routes and a helix in each, and the local battery will supply the current to all three at with shallow and deep notches, and a lever,

m, with a flat end at right angles to the lever,

which is raised at each blow of the striking apparatus, andthen it drops. If a deep notch in the strike-wheel presents itself, the lever drops far enough to stop the striking apparatus. strike-wheel the lever does not descend far enough to stop the striking, and the mechanism runs on to the next blowof the hammer.

If ashallow notch presents itself in the My improvement is applied with the lever m and count-wheel of the clock. I prefer to use a count-wheel that will strike at the quarter-hours. Such a count-wheel is shown by dotted lines in Fig. 4. It is, however, to be] 27, wire '28, helix 29, and wire to line understood that in the clock there should not be any bell or hammer, as the strokes would be confusing when the bell B was being struck. It is apparent that the simple addition of a greater number of teeth upon the count-wheel will cause the mechanism to strike more frequently than at the quarter-hours. If as many impressions were made upon the paper by the roller 6 as the hours struck in succession, too much paper a would be wasted, and the timemarks would take up too much space. I therefore arrange to give one impression each quarter-hour, and one dot for one oclock, two dots for two oclock, three for three oclock, and soon to six ocloek. A dash and then a dot now stand for seven, a dash-and two dots for eight, adash and three dots for nine, and so on, and a dash and six dots for twelve.

Upon inspection of Fig. 4 it will be seen that the end of the circuit-closing spring r is above the edge of the notched wheels, and as the teeth'come around in succession by the ordinary striking movement of the clock, the circuit between 8 and 10 is closed by r. The numbers around within the wheel indicate the portions alloted to giving the signals of the meaning; but when the dash comes before the dots it is to indicate six.

At the call-box O B the line L passes in by the wire L, to binding-post 21, through wire 22, and a spring-switch, 23 24, (seen in Fig. 3;) thence by 25 to train of gearing, through notched signal-wheel 26, insulated circuitspring 27, and by wire 28 through helix 29 of call-bell w, and out by 30 to line, and so on through as many call-boxes as there are in circuit. The call-box thus far named is well known, and I remark that the signal-wheel 26 is notched to send in a certain known number or signal to denote what box the call comes from.

The 'handle 32 is to be turned to wind-up the spring that moves the signal-wheel when the handle is let go. This is also usual; but I put upon the arbor of the handle the switch-opener 33, so that when the handle 32 is turned to bring the signal-wheel into position ready for action, the end of the switch-opener 33 presses against the spring 24, and raises the same,

- rangedor needed call. 5

or ground, and the helix 29, being in the circuit of the key-ac, the sender is able to know whether or not his signals are being sent,and an answer can be sent by the key K at the central station and received on the bell w. As

in when the handle is relieved, thus preventing the possibility of oversight under the most perplexing circumstances.

I claim as my invention 1. The combination, in a signal call-box,"of

a signal-wheel and its actuating mechanism,

' with a circuit-switch, 23 24, the switch-opener 33, acting upon the switch 24, and receiving its motion from the handle of the signal-whee], and a key, x,in ashunt circuit around the switch 23 24, substantially as set forth, whereby the key a can be operated by hand to signal the central station, while the handle 32 is drawn down and the switch opened at 24, substantially as set forth.

2. The combination, in a fire or district telegraph system, of a line circuit and battery, a call and key at the central station, and at the distant station a signal-wheel and its act uating mechanism, and a call-bell and a key, to be operated by hand, and a circuit-opener and circuits, asset forth, for connecting the key in the main line when the handle that actuates the signal-wheel is held down, sub stantially as set forth.

3. The combination, in a fire or district telegraph system, of a call-box and its signalwheel at the distant station, and at the central station an ink -register, with a disk and impression-pad, and a magnet for operating the same in a local circuit, and a relay in the main circuit, and a second ink-register disk, amagnet, and pressure-pad, for pressing the paper on such disk, a clock-movement, and a circuitism, of a wheel adapted to be moved around,

progressively with such count-wheel, and a spring circuit-closer, acted upon by the teeth in the periphery of the latter wheel, substan: tially as set forth.

Signed by me this 23d day of June, A. D. 1883.

FREDK. PEARCE.

Witnesses:

GEO. T. PINOKNEY, WILLIAM G. Morin. 

